Question

Entity 1 has the following observed characteristics: • A lipid- and protein-based outward-facing barrier that encloses a clearly defined and ordered internal environment, chemically distinct from its surroundings • The above-mentioned defined internal environment contains an additional compartment enclosed in its own separate lipid-based layer and housing a linear RNA-based genome • Detailed molecular analysis of the genome indicates that it has not shared a common ancestor with any extant bacteria within the last 3 billion years • Capability to undergo a form of self-directed replication that includes producing accurate copies of its own genome Based on the description above, select the best possible classification for Entity 1 from the options below. Entity 1 is not a living cell, of any type. Entity 1 is definitely a prokaryotic cell. Entity 1 is most likely a eukaryotic cell, but more information is needed. Entity 1 is definitely a eukaryotic cell. Entity 1 is equally likely to be a prokaryotic or eukaryotic cell.

          Entity 1 has the following observed characteristics:

• A lipid- and protein-based outward-facing barrier that encloses a clearly defined and ordered internal environment, chemically distinct from its surroundings
• The above-mentioned defined internal environment contains an additional compartment enclosed in its own separate lipid-based layer and housing a linear RNA-based genome
• Detailed molecular analysis of the genome indicates that it has not shared a common ancestor with any extant bacteria within the last 3 billion years
• Capability to undergo a form of self-directed replication that includes producing accurate copies of its own genome

Based on the description above, select the best possible classification for Entity 1 from the options below.

Entity 1 is not a living cell, of any type.
Entity 1 is definitely a prokaryotic cell.
Entity 1 is most likely a eukaryotic cell, but more information is needed.
Entity 1 is definitely a eukaryotic cell.
Entity 1 is equally likely to be a prokaryotic or eukaryotic cell.
        
Show more…
Entity 1 has the following observed characteristics:

• A lipid- and protein-based outward-facing barrier that encloses a clearly defined and ordered internal environment, chemically distinct from its surroundings
• The above-mentioned defined internal environment contains an additional compartment enclosed in its own separate lipid-based layer and housing a linear RNA-based genome
• Detailed molecular analysis of the genome indicates that it has not shared a common ancestor with any extant bacteria within the last 3 billion years
• Capability to undergo a form of self-directed replication that includes producing accurate copies of its own genome

Based on the description above, select the best possible classification for Entity 1 from the options below.

Entity 1 is not a living cell, of any type.
Entity 1 is definitely a prokaryotic cell.
Entity 1 is most likely a eukaryotic cell, but more information is needed.
Entity 1 is definitely a eukaryotic cell.
Entity 1 is equally likely to be a prokaryotic or eukaryotic cell.

Added by Mackenzie H.

Close

Biology for AP Courses
Biology for AP Courses
Julianne Zedalis, John Eggebrecht
AceChat toggle button
Close icon
Ace pointing down

Please give Ace some feedback

Your feedback will help us improve your experience

Thumb up icon Thumb down icon
Thanks for your feedback!
Profile picture
Entity 1 has the following observed characteristics: - A lipid- and protein-based outward-facing barrier that encloses a clearly defined and ordered internal environment, chemically distinct from its surroundings. - The above-mentioned defined internal environment contains an additional compartment enclosed in its own separate lipid-based layer and housing a linear RNA-based genome. - Detailed molecular analysis of the genome indicates that it has not shared a common ancestor with any extant bacteria within the last 3 billion years. - Capability to undergo a form of self-directed replication that includes producing accurate copies of its own genome. Based on the description above, select the best possible classification for Entity 1 from the options below: - Entity 1 is not a living cell, of any type. - Entity 1 is definitely a prokaryotic cell. - Entity 1 is most likely a eukaryotic cell, but more information is needed. - Entity 1 is definitely a eukaryotic cell. - Entity 1 is equally likely to be a prokaryotic or eukaryotic cell.
Close icon
Play audio
Feedback
Powered by NumerAI
David Collins Jennifer Stoner
Ivan Kochetkov verified

Sri K and 93 other subject Biology educators are ready to help you.

Ask a new question

*

Labs

-

Want to see this concept in action?

NEW

Explore this concept interactively to see how it behaves as you change inputs.

View Labs

*

Key Concepts

-
Key Concept
Premium Feature
Explore the core concept behind this problem.
Play button
Key Concept
Premium Feature
Explore the core concept behind this problem.
Your browser does not support the video tag.

*

Recommended Videos

-
1-we-know-that-the-mammalian-syncytin-gene-which-codes-for-the-protein-syncytin-which-in-turn-is-vital-for-the-development-of-the-placenta-has-a-viral-origin-because-please-select-one-or-mor-68777

We know that the mammalian syncytin gene, which codes for the protein syncytin, which, in turn, is vital for the development of the placenta, has a viral origin because (please select one or more as appropriate): - It is found in the middle of a sequence of "signature" genes characteristic of viruses in our genome. - We have cultivated the genes in the lab and found we could grow virus colonies from them. - There is no other explanation for how we acquired this gene. - This explains the low ratio of coding to non-coding genes, resulting in the misleading term "junk DNA". - We are unable to sequence this gene without using RNA-based primers.

Sri K.

the-dna-of-three-organisms-has-been-squenced-if-organism-sharc-1046-identical-sequences-with-organism-and-2050-with-organism-fou-cm-inlemre-s-mens-mais-more-related-thmn-o-more-relaled-than-84986

The DNA of three organisms has been sequenced. If organism A shares 1046 identical sequences with organism B and 2050 with organism C, you can interpret this to means: (a) A is more related to B than to C, (b) A is more related to C than to B, (c) A is clearly unrelated to either B or C, (d) A is clearly equally related to B and C, (e) this technique cannot be used to obtain this information. The organism that produces an exotoxin that blocks the neuromuscular junction resulting in sustained muscle contraction is: (a) Clostridium tetany, (b) Clostridium botulinum, (c) the agent that causes anthrax, (d) Clostridium sporogenes, (e) the agent that causes gas gangrene. A mixed culture is: (a) the same as a contaminated culture, (b) one that has been adequately stirred, (c) one that contains two or more known species, (d) a pond sample containing algae and protozoa, (e) one that contains a single known organism and one unknown organism. A specimen is coated with a metal so that 3-D image results. The image is magnified 25,000 times. This best describes: (a) a bright field microscope, (b) phase contrast microscope, (c) dark field microscope, (d) transmission electron microscope, (e) scanning electron microscope. Mycoplasmas are bacteria that lack cell walls. On the basis of this structural feature, which statement concerning mycoplasmas should be true: (a) they are gram-negative, (b) they are subject to lysis in hypotonic conditions, (c) they lack a cell membrane as well, (d) they undergo ready fossilization in sedimentary rock, (e) they possess typical prokaryotic flagella. Acid fast organism: (a) stain red with the acid fast stain, (b) include members of the genus Mycoplasma, (c) include the organism that causes tuberculosis, (d) include most of the staphylococci, (e) A and B are true, (f) A and C are true. The original distinction between the two types of cells, prokaryotic and eukaryotic, was made on the basis of the: (a) structure of the cell wall, (b) absence or presence of mitochondria, (c) absence or presence of a nuclear membrane, (d) absence or presence of ribosomes, (e) structure of the cell membrane. A smear is flooded with Sudan black and rinsed with water. This is most appropriately called an example of: (a) Gram stain, (b) acid fast stain, (c) flagellar stain, (d) negative stain, (e) fat stain An arrangement of flagella that is characterized by flagella on all surfaces of the bacterial cell is called: (a) atrichous, (b) peritrichous, (c) lophotrichous, (d) amphitrichous, (e) monotrichous. A protoplast: (a) is a gram positive cell without the cell wall, (b) has bits of cell wall attached to a cell membrane, (c) is formed when mycoplasma are stripped of their cell wall, (d) is usually a rod, (e) is usually 70s in size.

Madhur L.

for-the-following-questions-consider-these-known-facts-about-the-fole-0f-protcin-regulating-the-lysis-lysogeny-decision-lambda-phage-binding-of-protein-to-0-inhibits-transcription-of-th-cro-27774

For the following questions, consider these known facts about the role of cI protein in regulating the lysis/lysogeny decision in lambda phage: 1. Binding of cI protein to O_R1 inhibits transcription of the Cro gene. Thus, cI acts as a repressor of Cro gene transcription. 2. Interactions between cI protein bound to O_R2 and RNA polymerase bound to O_R3 (which also serves as the promoter for cI gene transcription) activate transcription of the cI gene. Thus, cI acts as an activator of cI gene transcription. 3. Transcription of the cI gene is inhibited by cI protein bound to O_R3. However, since the affinity of cI for O_R3 is weak, O_R3 is occupied by cI protein only when there is a high concentration of cI protein in the cell. E. If there is a burst of cI gene expression, which function of cI protein will be observed first? Why? F. What advantage might transcriptional inhibition confer when cI protein binds to O_R3? Why? cI protein exists as a dimer in solution and when bound to DNA (see Figure 3). cI dimers bind cooperatively to adjacent operator sites, one repressor dimer binding to each site. The term "cooperativity" refers in this case to a positively cooperative interaction in which the binding of a cI dimer to the high affinity OR1 site increases the affinity of a second dimer for the weaker OR2 site. Thus although the OR1 and OR2 sites differ in their affinities for cI by ~10-fold, two cI dimers bind simultaneously when OR1 and OR2 sites are adjacent (Figure 3). G. How might lambda phage benefit from the positively cooperative binding of cI to OR1 and OR2? H. cI proteins have two domains – the N-terminal domain, which contacts DNA, and the C-terminal domain, which mediates dimer formation and the cooperative interaction between dimers (Figure 3). What would happen to cI and Cro gene expression if the only available cI protein was truncated before the C-terminal domain, such that only the N-terminal domain remained? Why? Under normal circumstances, OR1 and OR2 are adjacent on the DNA, thus the C-terminal domains of a cI dimer bound to OR1 can interact with the C-terminal domains of a dimer bound to OR2 as shown schematically in Figure 3. Hochschild and Ptashne decided to ask what would happen to cooperative binding if the distance between OR1 and OR2 was increased.

Madhur L.


*

Recommended Textbooks

-
Biology for AP Courses

Biology for AP Courses

Julianne Zedalis, John Eggebrecht
achievement 1,020 solutions
Objective Biology for NEET

Objective Biology for NEET

Rajiv Vijay 1st Edition
achievement 1,171 solutions
Introduction to General, Organic and Biochemistry

Introduction to General, Organic and Biochemistry

Frederick A. Bettelheim, William H. Brown, Mary K. Campbell 12th Edition
achievement 1,873 solutions

*

Transcript

-
00:01 Hello students the answer to the question is as follows.
00:03 So it is in the middle of a sequence of signature gene characteristic of viruses in r0...
Need help? Use Ace
Ace is your personal tutor. It breaks down any question with clear steps so you can learn.
Start Using Ace
Ace is your personal tutor for learning
Step-by-step explanations
Instant summaries
Summarize YouTube videos
Understand textbook images or PDFs
Study tools like quizzes and flashcards
Listen to your notes as a podcast
Continue solving this problem
Create a free account to:
  • View full step-by-step solution
  • Ask follow-up questions with Ace AI
  • Save progress and study later
Continue Free
Join the community

18,000,000+

Students on Numerade


Trusted by students at 8,000+ universities

Numerade

Get step-by-step video solution
from top educators

Continue with Clever
or



By creating an account, you agree to the Terms of Service and Privacy Policy
Already have an account? Log In

A free answer
just for you

Watch the video solution with this free unlock.

Numerade

Log in to watch this video
...and 100,000,000 more!


EMAIL

PASSWORD

OR
Continue with Clever